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Standard Practice for Macroetch Testing of Tool Steel Bars
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STANDARD published on 15.8.2024
Designation standards: ASTM A561-08(2024)
Publication date standards: 15.8.2024
SKU: NS-1195449
The number of pages: 3
Approximate weight : 9 g (0.02 lbs)
Country: American technical standard
Category: Technical standards ASTM
This practice covers macroetch testing used for evaluating the quality of tool steel bars. This test shall be used as a quality control and inspection test to reveal by deep acid etching, the macrostructure in specimens cut from bars and to show the presence, absence, and severity of the following internal, surface, or subsurface conditions: pipe, bursts, carbide or alloy segregation, nonmetallic inclusion concentrations, porosity, cracks or thermal flakes, seams, laps, ingot corner segregation, pinholes, foreign material, and ingot pattern. Macroetching may be performed in a vessel of borosilicate glass, porcelain, corrosion-resistant metals, or some other acid resisting material. The etching reagent, specimen sampling, specimen preparation, and testing procedure including etching temperature, etching time, and macroetching technique are detailed.
Keywords:
ingot structure, macroetch, macrostructure, porosity, segregation,, ICS Number Code 77.140.60 (Steel bars and rods)
Adjunct to A561 Recommended Practice for Macrotech Testing of Tool Steel Bars
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